Het archief bekijken van woensdag 27 augustus 2025

Dagelijks bulletin over zonne- en geomagnetische activiteit van het SIDC

Datum verslag: 2025 Aug 27 1231 UTC

SIDC Prognose

Zonnevlammen

M-class flares expected (probability >=50%)

Geomagnetisme

Active conditions expected (A>=20 or K=4)

Proton Flux monitor

Proton event expected (10 pfu at >10 MeV)

	10cm flux	Ap
27 Aug 2025	202	007
28 Aug 2025	202	007
29 Aug 2025	202	007

Zonnevlekkengebieden en zonnevlammen

Solar flaring activity was moderate over the past 24 hours, with 1 M-class flare identified. This was an M1.0 flare (SIDC Flare 5239) peaking on August 26 at 14:07 UTC, which was produced by SIDC Sunspot Group 592 (NOAA Active Regions 4202). A total of 14 numbered sunspot groups were identified on the disk over the past 24 hours. Solar flaring activity is expected to be moderate over the next 24 hours, with M-class flares likely.

Coronale massa uitstoten

No Earth-directed Coronal Mass Ejections (CMEs) have been observed in the last 24 hours.

Coronale gaten

SIDC Coronal Hole 126 (northern mid-latitude coronal hole with negative polarity) is located in the western hemisphere, its associated high speed stream may still reach the Earth today.

Zonnewind

The Earth is inside slow solar wind with speeds around 350 km/s and interplanetary magnetic fields of about 7 nT (directed towards the Sun, negative polarity). The high speed stream from SIDC Coronal Hole 126 has not arrived to the Earth, it may still do so today (with minor influence expected).

Geomagnetisme

Geomagnetic conditions have been quiet (Kp and B_Bel between 0 and 2). Quiet to unsettled periods are expected for the next 24 hours.

Proton flux niveaus

The greater than 10 MeV proton flux passed above the 10 pfu threshold on 26 August, and is currently at 12 pfu. The proton levels started to slowly increase on 22 August (as the result of a backsided CME on 21 August) and have gradually approached the threshold. Since 25 August the levels were very close to the 10 pfu mark. The flux will remain elevated in the next 24 hours, but no strong additional increases are expected.

Elektronenfluxen in geostationaire baan

The greater than 2 MeV electron flux as measured by GOES 18 and 19 remained below the 1000 pfu alert threshold, similar conditions expected for the next 24 hours. The 24 h electron fluence was at normal levels and is expected to remain so.

Het geschatte internationale zonnevlekkengetal (ISN) van vandaag: 199, gebaseerd op 12 stations.

Zon indexen voor 26 Aug 2025

Wolfgetal Catania	172
10cm zonneflux	202
AK Chambon La Forêt	011
AK Wingst	008
Geschatte Ap	009
Geschat internationaal zonnevlekkengetal	187 - Gebaseerd op 26 stations

Overzicht opvallende gebeurtenissen

Aangeboden door het Solar Influences Data Analysis Center© - SIDC - Verwerkt door SpaceWeatherLive

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